Return Casserole to heat; add onion, bell pepper, pressed garlic and thyme. Cook 4-5 minutes or until vegetables are tender, stirring frequently. Add flour; cook and stir until combined. Stir in stock and milk. Add potatoes, half of the bacon, salt and black pepper. Bring to a simmer; reduce heat to medium-low and cook 10-12 minutes or until chowder is thickened and potatoes are tender. Add corn; return to a simmer. Serve with remaining bacon.